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    <meta charset="UTF-8">
    <title>Title</title>
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   <pre>
       import math

       pos = [0,0]
       while True:
           s = input()
           if not s:
               break
           if s == "STOP":
               break
           movement = s.split(" ")
           direction = movement[0]
           steps = int(movement[1])
           if direction == "UP":
               pos[0] += steps
           elif direction == "DOWN":
               pos[0] -=steps
           elif direction == "LEFT":
               pos[1] -= steps
           elif direction =="RIGHT":
               pos[1] += steps
           else:
               pass

       print(int(round(math.sqrt(pos[1] ** 2 + pos[0] ** 2))))
</pre>
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